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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    p {
    color: blue;
    }
    body {
    color: red;
    }
    <!-- a链接浏览器默认制定一个样式 蓝色的 有下划线  a { color blue;}-->
    a {
    color: green;
    }
</head>

<body>
    <div id="father">
        <p>你还是很好看</p>
    </div>
    <a href="#">我是单独的样式</a>
</body>

</html>